I've just finshed working on two 'Secret Cinema' productions this year in London. The first was the meticulously recreated 'Grand Budapest Hotel' (which was not a secret) and the other is still performing and remains a secret... It's not Dumbo. A terrific cast and production team on both shows. If you're not familiar I highly recommend going.
SPOLIER ALERT: It was the Coen brothers film 'Millers' Crossing'. Here's a video of the production. https://www.youtube.com/watch?v=gcOSt7LyMnw